Alert archive / North Carolina / Freeze Warnings in 2021
Freeze Warning 2, NWS Raleigh, NC
NWS Raleigh, NC issued this freeze warning at Apr 21, 2021, 10:58 AM EDT for 19 counties in North Carolina. It took effect at Apr 22, 2021, 4:00 AM EDT. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 21, 2021, 10:58 AM EDT (14:58 UTC)
- In effect from
- Apr 22, 2021, 4:00 AM EDT
- Expired
- Apr 22, 2021, 8:00 AM EDT
- In force
- 4 hr
- Issued by
- NWS Raleigh, NC
Counties Alamance County, NC, Anson County, NC, Chatham County, NC, Davidson County, NC, Durham County, NC, Forsyth County, NC, Franklin County, NC, Granville County, NC, Guilford County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Stanly County, NC, Vance County, NC, Warren County, NC
The radar
The Raleigh/Durham radar (KRAX), 80 km from the middle of the area, began a volume at 15:00 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 3.0 hours before the alert went out and 57 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 7 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 1289 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 200 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
725 WWUS72 KRAH 211458 NPWRAH URGENT - WEATHER MESSAGE National Weather Service Raleigh NC 1058 AM EDT Wed Apr 21 2021 NCZ007>010-021>026-038>040-073>076-083-084-220400- /O.NEW.KRAH.FZ.W.0002.210422T0800Z-210422T1200Z/ Person-Granville-Vance-Warren-Forsyth-Guilford-Alamance-Orange- Durham-Franklin-Davidson-Randolph-Chatham-Stanly-Montgomery-Moore- Lee-Anson-Richmond- Including the cities of Roxboro, Oxford, Creedmoor, Henderson, Kittrell, Warrenton, Norlina, Winston-Salem, Greensboro, High Point, Burlington, Graham, Mebane, Hillsborough, Chapel Hill, Carrboro, Durham, Rougemont, Louisburg, Franklinton, Lexington, Thomasville, Asheboro, Archdale, Siler City, Pittsboro, Albemarle, Troy, Southern Pines, Pinehurst, Aberdeen, Carthage, Sanford, Wadesboro, Polkton, Rockingham, and Ellerbe 1058 AM EDT Wed Apr 21 2021 ...FREEZE WARNING IN EFFECT FROM 4 AM TO 8 AM EDT THURSDAY... * WHAT...Freezing temperatures of 30 to 32 expected, especially in outlying and rural areas. * WHERE...NC Piedmont and northern coastal plain counties. * WHEN...From 4 AM to 8 AM EDT Thursday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ NCZ011-027-028-041>043-077-078-085-086-088-089-220400- /O.NEW.KRAH.FR.Y.0003.210422T0800Z-210422T1200Z/ Halifax-Nash-Edgecombe-Wake-Johnston-Wilson-Harnett-Wayne- Scotland-Hoke-Cumberland-Sampson- Including the cities of Roanoke Rapids, Enfield, Scotland Neck, Nashville, Spring Hope, Rocky Mount, Tarboro, Princeville, Raleigh, Cary, Apex, Wake Forest, Knightdale, Smithfield, Selma, Clayton, Wilson, Lillington, Angier, Buies Creek, Erwin, Dunn, Goldsboro, Laurinburg, Camp Mackall, Wagram, Raeford, Fayetteville, Spring Lake, Hope Mills, Clinton, and Roseboro 1058 AM EDT Wed Apr 21 2021 ...FROST ADVISORY IN EFFECT FROM 4 AM TO 8 AM EDT THURSDAY... * WHAT...Temperatures 33 to 36 will result in patchy frost formation, especially in outlying and rural areas. * WHERE...NC Sandhills and Coastal Plain counties. * WHEN...From 4 AM to 8 AM EDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
3 follow-up statements
260 WWUS72 KRAH 220319 NPWRAH URGENT - WEATHER MESSAGE National Weather Service Raleigh NC 1119 PM EDT Wed Apr 21 2021 NCZ007>010-021>026-038>040-073>076-083-084-221130- /O.CON.KRAH.FZ.W.0002.210422T0800Z-210422T1200Z/ Person-Granville-Vance-Warren-Forsyth-Guilford-Alamance-Orange- Durham-Franklin-Davidson-Randolph-Chatham-Stanly-Montgomery-Moore- Lee-Anson-Richmond- Including the cities of Roxboro, Oxford, Creedmoor, Henderson, Kittrell, Warrenton, Norlina, Winston-Salem, Greensboro, High Point, Burlington, Graham, Mebane, Hillsborough, Chapel Hill, Carrboro, Durham, Rougemont, Louisburg, Franklinton, Lexington, Thomasville, Asheboro, Archdale, Siler City, Pittsboro, Albemarle, Troy, Southern Pines, Pinehurst, Aberdeen, Carthage, Sanford, Wadesboro, Polkton, Rockingham, and Ellerbe 1119 PM EDT Wed Apr 21 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 4 AM TO 8 AM EDT THURSDAY... * WHAT...Freezing temperatures of 30 to 32 expected, especially in outlying and rural areas. * WHERE...Piedmont of NC. * WHEN...From 4 AM to 8 AM EDT Thursday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ NCZ011-027-028-041>043-077-078-085-086-088-089-221130- /O.CON.KRAH.FR.Y.0003.210422T0800Z-210422T1200Z/ Halifax-Nash-Edgecombe-Wake-Johnston-Wilson-Harnett-Wayne- Scotland-Hoke-Cumberland-Sampson- Including the cities of Roanoke Rapids, Enfield, Scotland Neck, Nashville, Spring Hope, Rocky Mount, Tarboro, Princeville, Raleigh, Cary, Apex, Wake Forest, Knightdale, Smithfield, Selma, Clayton, Wilson, Lillington, Angier, Buies Creek, Erwin, Dunn, Goldsboro, Laurinburg, Camp Mackall, Wagram, Raeford, Fayetteville, Spring Lake, Hope Mills, Clinton, and Roseboro 1119 PM EDT Wed Apr 21 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 4 AM TO 8 AM EDT THURSDAY... * WHAT...Temperatures 33 to 36 may result in patchy frost formation, especially in outlying and rural areas. * WHERE...Sandhills and Coastal Plain. * WHEN...From 4 AM to 8 AM EDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
306 WWUS72 KRAH 220709 NPWRAH URGENT - WEATHER MESSAGE National Weather Service Raleigh NC 309 AM EDT Thu Apr 22 2021 NCZ007>010-021>026-038>040-073>076-083-084-221200- /O.CON.KRAH.FZ.W.0002.210422T0800Z-210422T1200Z/ Person-Granville-Vance-Warren-Forsyth-Guilford-Alamance-Orange- Durham-Franklin-Davidson-Randolph-Chatham-Stanly-Montgomery-Moore- Lee-Anson-Richmond- Including the cities of Roxboro, Oxford, Creedmoor, Henderson, Kittrell, Warrenton, Norlina, Winston-Salem, Greensboro, High Point, Burlington, Graham, Mebane, Hillsborough, Chapel Hill, Carrboro, Durham, Rougemont, Louisburg, Franklinton, Lexington, Thomasville, Asheboro, Archdale, Siler City, Pittsboro, Albemarle, Troy, Southern Pines, Pinehurst, Aberdeen, Carthage, Sanford, Wadesboro, Polkton, Rockingham, and Ellerbe 309 AM EDT Thu Apr 22 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... * WHAT...Freezing temperatures as low as 30 degrees expected. * WHERE...Piedmont of NC. * WHEN...From 4 AM to 8 AM EDT Thursday. * IMPACTS...Freezing temperatures could damage or kill crops or other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ NCZ011-027-028-041>043-077-078-085-086-088-089-221200- /O.CON.KRAH.FR.Y.0003.210422T0800Z-210422T1200Z/ Halifax-Nash-Edgecombe-Wake-Johnston-Wilson-Harnett-Wayne- Scotland-Hoke-Cumberland-Sampson- Including the cities of Roanoke Rapids, Enfield, Scotland Neck, Nashville, Spring Hope, Rocky Mount, Tarboro, Princeville, Raleigh, Cary, Apex, Wake Forest, Knightdale, Smithfield, Selma, Clayton, Wilson, Lillington, Angier, Buies Creek, Erwin, Dunn, Goldsboro, Laurinburg, Camp Mackall, Wagram, Raeford, Fayetteville, Spring Lake, Hope Mills, Clinton, and Roseboro 309 AM EDT Thu Apr 22 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... * WHAT...Temperatures in the mid 30s may result in patchy frost formation, especially in outlying and rural areas. * WHERE...Sandhills and Coastal Plain. * WHEN...From 4 AM to 8 AM EDT Thursday. * IMPACTS...Frost could damage sensitive outdoor vegetation if left unprotected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ PWB
089 WWUS72 KRAH 221158 NPWRAH URGENT - WEATHER MESSAGE National Weather Service Raleigh NC 758 AM EDT Thu Apr 22 2021 NCZ007>010-021>026-038>040-073>076-083-084-221300- /O.EXP.KRAH.FZ.W.0002.000000T0000Z-210422T1200Z/ Person-Granville-Vance-Warren-Forsyth-Guilford-Alamance-Orange- Durham-Franklin-Davidson-Randolph-Chatham-Stanly-Montgomery-Moore- Lee-Anson-Richmond- Including the cities of Roxboro, Oxford, Creedmoor, Henderson, Kittrell, Warrenton, Norlina, Winston-Salem, Greensboro, High Point, Burlington, Graham, Mebane, Hillsborough, Chapel Hill, Carrboro, Durham, Rougemont, Louisburg, Franklinton, Lexington, Thomasville, Asheboro, Archdale, Siler City, Pittsboro, Albemarle, Troy, Southern Pines, Pinehurst, Aberdeen, Carthage, Sanford, Wadesboro, Polkton, Rockingham, and Ellerbe 758 AM EDT Thu Apr 22 2021 ...FREEZE WARNING WILL EXPIRE AT 8 AM EDT THIS MORNING... Most areas have risen above freezing, however a few locations may linger at or below freezing for the next hour. The Freeze Warning will be allowed to expire at 8 AM. $$ NCZ011-027-028-041>043-077-078-085-086-088-089-221300- /O.EXP.KRAH.FR.Y.0003.000000T0000Z-210422T1200Z/ Halifax-Nash-Edgecombe-Wake-Johnston-Wilson-Harnett-Wayne- Scotland-Hoke-Cumberland-Sampson- Including the cities of Roanoke Rapids, Enfield, Scotland Neck, Nashville, Spring Hope, Rocky Mount, Tarboro, Princeville, Raleigh, Cary, Apex, Wake Forest, Knightdale, Smithfield, Selma, Clayton, Wilson, Lillington, Angier, Buies Creek, Erwin, Dunn, Goldsboro, Laurinburg, Camp Mackall, Wagram, Raeford, Fayetteville, Spring Lake, Hope Mills, Clinton, and Roseboro 758 AM EDT Thu Apr 22 2021 ...FROST ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING... Temperatures have risen into the upper 30s for most areas, however a few locations may hover in the low to mid 30s for the next hour. The Frost Advisory will be allowed to expire at 8 AM. $$ JJT
The office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 3:22 AM EDT | Red Flag Warning | RAH | Alamance, Anson, Chatham, Davidson, Durham, Forsyth and 17 more | 17 hr |
| Apr 21, 10:58 AM EDT | Frost Advisory | RAH | Cumberland, Edgecombe, Halifax, Harnett, Hoke, Johnston and 6 more | 21 hr |
Nearby
Freeze Warnings in North Carolina, 2021Every freeze warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.